To set conditions for finding duplicate hosts and to automatically delete those duplicate clients whose update date/time is old:

1. In the System Configuration window, choose Options, and then Auto System Configuration Maintenance.
   The Automatic System Configuration Maintenance dialog box appears.
   
2. Choose the Duplicate condition settings tab.
   The Duplicate condition settings page is displayed.
   

   Figure 9-13 Duplicate condition settings page

   

3. Select the Delete automatically check box and set the applicable items.
   The system will search for hosts that have different host IDs but which satisfy the conditions you select here. When you select multiple conditions, they are treated as AND conditions. If you include MAC address as a condition, neither UNIX clients nor clients with PPP connection will be searched. In the case of a UNIX client with version 08-10 or later, if MAC addresses are set to be acquired in the system configuration information, duplicate hosts can be searched.
   

   Match MAC address

   Searches for multiple hosts that have the same MAC address in the system configuration information.

   Match IP address

   Searches for multiple hosts that have the same IP address in the system configuration information.

   Match host name

   Searches for multiple hosts that have the same host name in the system configuration information.

   Schedule

   Specifies a time for starting automatic client deletion and a maximum processing time for automatic client deletion. When automatic client deletion starts, it will terminate when the maximum processing time elapses, even if there are still clients remaining to be deleted. If the maximum processing time is set to 0, the deletion processing will not be terminated until all clients that should be deleted have been deleted. Whenever some clients that should have been deleted remain, they are deleted the next time deletion processing is performed.

4. After specifying the settings, click the OK button.
   Regardless of the time on the day when you choose OK, automatic maintenance of the system configuration is activated for the first time the next day, even if the specified start time has not been reached on the current day.